Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250410-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/04/2025, 12:40

General

  • Target

    JaffaCakes118_b7c5f990db52ac75ce2a35d90fc2a6c7.exe

  • Size

    284KB

  • MD5

    b7c5f990db52ac75ce2a35d90fc2a6c7

  • SHA1

    44ad60efe1e65a5050247c5dbb2909711a968a71

  • SHA256

    9fb59f8cfcb48061a4aeac19e4e53c406014d39e75f1682a37358e8e80ff9914

  • SHA512

    7609f991b1219f9065d449f9e990203948d0f4f1f9ace310f43aaa33559c021127d717648e1671d5b02ea4e860757571a8f90b3210116f9c92aa46e53a23e2c8

  • SSDEEP

    6144:rD7cY2fgssM7Wirg9KXylmRiL+QMeC/i6isqX7UovnONztByipwxZLctl:rl8E4w5huat7UovONzbXwnel

Malware Config

Extracted

Family

darkcomet

Botnet

TEST

C2

jamesonb.no-ip.biz:1604

Mutex

DC_MUTEX-9VHT05G

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    XjfYLBiL07yM

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

rc4.plain

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 7 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 62 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b7c5f990db52ac75ce2a35d90fc2a6c7.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b7c5f990db52ac75ce2a35d90fc2a6c7.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3928
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b7c5f990db52ac75ce2a35d90fc2a6c7.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:468
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b7c5f990db52ac75ce2a35d90fc2a6c7.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:5240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2920
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:5024
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2224
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4672
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3440
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4036
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4204
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4684

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

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Downloads

  • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

    Filesize

    284KB

    MD5

    b7c5f990db52ac75ce2a35d90fc2a6c7

    SHA1

    44ad60efe1e65a5050247c5dbb2909711a968a71

    SHA256

    9fb59f8cfcb48061a4aeac19e4e53c406014d39e75f1682a37358e8e80ff9914

    SHA512

    7609f991b1219f9065d449f9e990203948d0f4f1f9ace310f43aaa33559c021127d717648e1671d5b02ea4e860757571a8f90b3210116f9c92aa46e53a23e2c8

  • memory/2224-9-0x00000000007F0000-0x00000000007F1000-memory.dmp

    Filesize

    4KB

  • memory/3928-0-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/3928-1-0x00000000006E0000-0x00000000006E1000-memory.dmp

    Filesize

    4KB

  • memory/3928-16-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/4036-7-0x0000000000A70000-0x0000000000A71000-memory.dmp

    Filesize

    4KB

  • memory/4036-11-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/4204-8-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/4672-13-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/4672-18-0x0000000000400000-0x00000000004CA000-memory.dmp

    Filesize

    808KB

  • memory/4684-15-0x0000000000D70000-0x0000000000D71000-memory.dmp

    Filesize

    4KB